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Posted by: Bob Cozzi
IT Researcher
Cozzi Productions, Inc.
North Aurora, IL
Bob Cozzi's RPG IV Cheat Sheets
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Published: 08 Feb 2011
Revised: 04 Aug 2011 - 4143 days ago
Last viewed on: 07 Dec 2022 (5624 views) 

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Bob Cozzi's RPG IV Cheat Sheets Published by: Bob Cozzi on 08 Feb 2011 view comments

When using %DEC, you are not allowed to specify %LEN(targetVar) and %DECPOS(targetVar) for the second and third parameters of the %DEC built-in function. The code below illustrates how to use named constants to circumvent this shortcoming.

     D numVar          S              7P 2                                 
     D charVar         S             10A   Inz(' 543.21')                  
     D NUMLEN          C                   Const(%len(numVar))             
     D NUMPOS          C                   Const(%decpos(numVar))          
     C                   EVAL      *INLR = *ON                             
          numVar = %dec( charVar : 7 : 2);     // Valid                    
          numVar = %dec( charVar : %Len(numVar) : %decPos(numVar)); // Fail
          numVar = %dec( charVar : NUMLEN : NUMPOS );  // Valid            

As seen on line 14 above, the named constants NUMLEN and NUMPOS may be used when you want the target variable's attributes to influence the %DEC built-in function. Line 12 illustrates an assumed valid syntax, but does not compile. So the code on line 14 is necessary, or worse, the code on line 10 (hard coding the values) may be used.

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